title: Shear mechanical properties of the porcine pancreas: experiment and analytical modelling.
abstract: We provide the first account of the shear mechanical properties of porcine pancreas using a rheometer both in linear oscillatory tests and in constant strain-rate tests reaching the non-linear sub-failure regime. Our results show that pancreas has a low and weakly frequency-dependent dynamic modulus and experiences a noticeable strain-hardening beyond 20% strain. In both linear and non-linear regime, the viscoelastic behaviour of porcine pancreas follows a four-parameter bi-power model that has been validated on kidney, liver and spleen. Among the four solid organs of the abdomen, pancreas proves to be the most compliant and the most viscous one.
authors.affiliation: Université de Lyon, F-69622, Lyon, France. stephane.nicolle@ifsttar.fr
authors.forename: S
authors.initials: S
authors.lastname: Nicolle
authors.forename: L
authors.initials: L
authors.lastname: Noguer
authors.forename: J-F
authors.initials: JF
authors.lastname: Palierne
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D008954:Models, Biological; D017711:Nonlinear Dynamics; D010179:Pancreas / Q000166:cytology; D033081:Shear Strength; D013552:Swine
keywords: Constitutive Law; Shear Mechanical Properties; Soft Tissues